High Performance‐Low Cost‐Chemiresitive BaTiO <sub>3</sub> Nanospheres Based CO <sub>2</sub> Gas Sensor for Air Quality Monitoring
Jolina Rodrigues, Navinchandra G. Shimpi
Abstract
Abstract Spherical shaped Barium titanate (BaTiO 3 ) nanospheres was synthesized, using co‐precipitate technique. The as‐synthesized nanospheres was discovered to be discriminatory in terms of sensing carbon dioxide (CO 2 ) gas. The structural parameters like, shape, optical properties, morphology, and thermal stability were explored using XRD, FT‐IR, UV‐Visible, EDS and FE‐SEM. Spherical shaped BaTiO 3 nanospheres material have the highest response (63 %) for CO 2 gas. CO 2 gas reaction and recovery times were 23.5 and 20.3 seconds, respectively. The CO 2 gas concentration climbs from 1 to 50 ppm, reaction to gas sensors increases. CO 2 gas has higher selectivity for BaTiO 3 nanospheres as compared to other gases like carbon dioxide (CO 2 ), methane (CH 4 ), carbon monoxide (CO), nitric oxide (NO), hydrogen sulphide (H 2 S) and hydrogen (H 2 ). The repeatability of BaTiO 3 nanospheres was researched for 42 days and discovered to be impressive.